blood sugar issues

Hey everyone its been a while but I am having some issues that I don't know if others have exe\perienced.  Lately I have been having bloodsugar issues : what I mean is my sugar levels ahve been all over the place sometimes low like 70, sometimes extreemely high like 215, they never were that high even before I was diagnosed as diabetic. Is this unstable blood sugar or what?  Is there anything I can do to get it to stablize?  I have lost my health insurance and  still looking for work and the blood work the dr wants me to do will cost 1500 tp 2500 dollars plus 250 to walk into his office,
Any help is greatly appreciated.